388 



ORDER 155. GRAMINE^E. 



May. 



at base. Glumes and pales awnless, subequal, of similar 



texture. Grain glabrous, free. Turfy grasses, none native. 



sclienoides Lam. Tufted, glaucous, 312' ; Ivs. 23', long- 



pntd. ; spk. oblong. (T) Waste ground, E. Penn., Del., etc. Eur. 



14. ORYZOPSIS, MX. MOUNTAIN RICE. Spkl. 1-flwd. 

 in a slender spicate panicle. Gl. membranous at edge, 

 subequal, about equaling Hie oblong, terete, short-stiped 

 flower. Lower pale coriaceous, involute, enclosing the 

 grain, and tipped with a simple, jointed awn. U 



1 O. melanocarpa Muhl. Culm leafy to the top, 1 Hf ; leaves 



lance-linear; rachis flexuous ; few-flwd. ; gl. 5 6" ; awn thrice 

 longer (F) than its blackish pale. if. Rocky woods and hills, Mid- 

 dle States, and northward. Aug. 



2 O. asperefolla MX. (a) Calm 10 -20', its sheaths leafless; Ivs. 1 or 2, subradical, 



erect, rigid, pungent, If; the simple pan. 24' long; gl. (4) whitish, 3"; awn crooked, 

 (i" long, its pale and grain whitish. ii Woods, N. States and Canada. 



3 O, C'aiiadensis (Poir.) Culm slender, 9 18', naked 



above; lower sheaths bearing rigid, involute-filiform 

 leaves ; pan. 1 2' ; awn short or 0. Kocks. N. May. 



15. STIPA, L. FEATHER G. The flower de- 

 ciduous from the glumes with its sharp and 

 bearded stipe. Pales coriaceous, short, the lower 

 embracing the upper and the slender grain, and 

 bearing a long twisted or bent awn. it Leaves 

 narrow. Pan. loose. (Sec Addenda.} 



\ S. aveimcea L. Black Oat-G. (c) Culm naked above, 

 2 3f; Ivs. mostly radical, setaceous; pan. 4 G' long, 

 the capillary branches at length diffuse ; gl. (') equal- 

 ing the blackish fruit; awn (b) 23' long, twisted be- ,,, 

 low, bent : common. July. r I 



2 S. juncea Pursh. Weather G. Culm 2 3f; loaves rollcd-threadform. long; glume 



blender-pointed, twice longer than the fruit; awn contorted, bent, 4 G' long. The 

 pungent stipe adheres like tick-seed. Prairies, 111., Mo., and N. May July. 



3 S. TKNNATA. Feather G. From Europe. Culm 2f; Ivs. rolled threadform at apex : 



gl. awn-pointed. 1' : awn 8 1G' long, twisted below, softly plumous above, and 

 worn (says Gerard) by sundry ladies instead of feathers. 11 



16. ARISTIDA, L. BEARD G. POVERTY G. 

 Panicle contracted and racemous. The flower 

 stiped in the unequal glumes. Lower pale with 

 3 awns at the tip variously contorted. Culms 

 branching. Leaves narrow, often rolled. In 

 sterile soils. Aug. Oct. 



Awns tw' tied and united below, jointed to 



the pale, very long No. 1 



Awns distinct to the base and not jointed to 



the pale., .(a) 

 a Awns very unequal, the 2 lateral 4 times 



thorlcr (2") and erect Nos. 2, 3 



a Awns unequal, the 2 lateral twice shorter 



.(G'O and fcuherert No. 4 



Cultivated. 



